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spapr_pci: provide node start offset via spapr_populate_pci_dt() 

PHB hotplug re-uses PHB device tree generation code and passes
it to a guest via RTAS. Doing this requires knowledge of where
exactly in the device tree the node describing the PHB begins.

Provide this via a new optional pointer that can be used to
store the PHB node's start offset.

Signed-off-by: Michael Roth <mdroth@linux.vnet.ibm.com>
Reviewed-by: David Gibson <david@gibson.dropbear.id.au>
Signed-off-by: Greg Kurz <groug@kaod.org>
Message-Id: <155059671912.1466090.10891589403973703473.stgit@bahia.lab.toulouse-stg.fr.ibm.com>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
This commit is contained in:
Michael Roth 2019-02-19 18:18:39 +01:00 committed by David Gibson
parent 4b6d336f2c
commit 0a0a66cd1b
3 changed files with 6 additions and 3 deletions
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2
hw/ppc/spapr.c
View File

@ -1312,7 +1312,7 @@ static void *spapr_build_fdt(sPAPRMachineState *spapr)
QLIST_FOREACH(phb, &spapr->phbs, list) {
ret = spapr_populate_pci_dt(phb, PHANDLE_INTC, fdt,
spapr->irq->nr_msis);
spapr->irq->nr_msis, NULL);
if (ret < 0) {
error_report("couldn't setup PCI devices in fdt");
exit(1);

5
hw/ppc/spapr_pci.c
View File

@ -2153,7 +2153,7 @@ static void spapr_phb_pci_enumerate(sPAPRPHBState *phb)
}
int spapr_populate_pci_dt(sPAPRPHBState *phb, uint32_t intc_phandle, void *fdt,
uint32_t nr_msis)
uint32_t nr_msis, int *node_offset)
{
int bus_off, i, j, ret;
gchar *nodename;
@ -2208,6 +2208,9 @@ int spapr_populate_pci_dt(sPAPRPHBState *phb, uint32_t intc_phandle, void *fdt,
nodename = g_strdup_printf("pci@%" PRIx64, phb->buid);
_FDT(bus_off = fdt_add_subnode(fdt, 0, nodename));
g_free(nodename);
if (node_offset) {
*node_offset = bus_off;
}
/* Write PHB properties */
_FDT(fdt_setprop_string(fdt, bus_off, "device_type", "pci"));

2
include/hw/pci-host/spapr.h
View File

@ -113,7 +113,7 @@ static inline qemu_irq spapr_phb_lsi_qirq(struct sPAPRPHBState *phb, int pin)
}
int spapr_populate_pci_dt(sPAPRPHBState *phb, uint32_t intc_phandle, void *fdt,
uint32_t nr_msis);
uint32_t nr_msis, int *node_offset);
void spapr_pci_rtas_init(void);